Metal form for monolithic concrete structures.



L. EISENKRAMER.

METAL FORM FOR MONOLITHIO CONCRETE STRUCTURES.

APPLICATION FILED MAY 15, 1911.

1,052,328. I Patented Feb. 4, 1913.

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METAL FORM FOR MONOLITHIG CONCRETE STRUCTURES.

Patented Feb. 4, 1913.

2 SHEETS-SHEET 1.

APPLICATION FILED MAY 15, 1911.

UNTTED STATES PATENT UFFTCE.

LUDWIG EISENKBAMER, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-THIRD T0 MICHAEL LIEBSTER, OF ST. LOUIS, MISSOURI.

METAL FORM FOR MONOLITHIC CONCRETE STRUCTURES.

Specification of Letters Patent.

Patented Feb. 4, 191 3.

Application filed May 15, 1911. Serial No. 627,868.

To all whom it may concern:

Be it known that I, LUDWIG Eisen- KRAMER, a citizen of the United States, and

resident of St. Louis, Missouri, have invent ed certain new and useful Improvements in Metal Forms for Monolithic Concrete Structures, of which the following is a specification containing a full, clear, and exact description, reference being had to the accompanying drawings, forining apart hereof.

My invention relates to improvements in metal forms for monolithic concrete structures, and the. object of my invention is to construct a. form" of sections, each section being provided with marginal reinforcing flanges and with locking devices so that the sections maybe held in either a horizontal or vertical position, and the locking devices coacting with keys in the form of angle irons to hold the sections in perfect alinement, which keys obviate the necessity of employing stays between the sections as required at the present time in the formation of a wall. And a further object of my in-' vention is to construct a. truss for supporting the overhead sections, which truss obviates the necessity of employing supporting devices extended from the floor below and results in a free operating space.

\Vith the above purposes in view my invention consists in certain novel features of construction and arrangement of parts as will be hereinafter more fully described, pointed out in the claims and illustrated by the accompanying drawings, in which- Figure l-shows, in section, a form consisting of a number of my improved sections set up for the purpose of forming the walls and ceiling of one room of a building; Fig. 2 is a perspective of one of my improved form sections; Fig. 3 is a detail, sectional plan taken on the line 3-3 of Fig. 1; Fig. 4 is a sectional elevation illustrating one of my improved locking de vices; Fig. 5 is an enlarged, transverse, sectional elevation taken on the line 55 of Fig. 1; and Fig. (l is an end elevation of one of my improved corner sections.

Referring by numerals to the accompanying drawings: 1 designates the body portion of one of my improved sections .and conmetal.

sists preferably of a single piece of sheet This metal is preferably galvanized so as to present a smooth surface to the concrete and also to. protect it against moisture to prevent rust. The sheet 1 is reinforced at its margins by means of angle irons 2.

3 and 4 designate journal bearings which are secured to the angle irons 2.; and 5 designates a locking-device which is journaled between the bearings 3 and 4. The locking device consists of asingle piece of metal having spaced apart jaws 6 and 7 which, as shown in Fig. 4, are designed to embrace the angle irons 2 of abutting sections, the jaw 6 being slotted so that the locking de vice may be moved relative its journal. as will be made clear hereinafter.

The journal bearing 3 has formed integral therewith a projecting stop 8 which is arranged to engage the angle iron 2 of an abutting section for the purpose of alining the sections.

The journal bearing 4 has formed integral therewith a key seat 9 which. as shown in Fig. 3, is designed to receive and hold the key 10 in the form of an angle iron for the purpose of holding in alinement and trussing a number of joined sections.

Carried by the angle iron 2 opposite the one supporting the locking device there is a keeper 11 arranged to embrace the lower most jaw 7 of the locking device when the same is in a locking position, the keeper being desi ned to prevent longitudinal movements 0 sections relative each other. These locking devices are preferably located, as shown in Fig. 1. so that the sections may be locked together with some of the seek tions at right angles to others.

' 12 designates the body portion of a corner section which is preferably constructed of a single piece of sheet metal bent in angle form, this corner sectionbeing equipped with the same locking devices as the section 1.

13 designates a key which is held in a manner identical with the key 10 to the sections forming the ceiling. Secured to the key 13 is a T-iron 14.

As shown in Fig. 1 of the drawings. certain of the keys 10 are perforated so as to receive the pins 15 for the support of the truss rods 16, the inner ends of the truss rods being adjustably connected by means of devices such as turn buckles 17. 18 designates supports which are slidably connected with the T-iron 14 and designed to ride the truss rods 16. These supports are preferably made of a single piece of metal of sufficient strength and rigidity to Withstand the strain when the turn buckles are moved to tighten the truss rods as re quired to take up whatever sag there may be throughout the length of the T-iron 14, key 13 and the sections of the ceiling.

By reason of the projections 8 the body portions 1 of the sections are held in perfect alinement with each other and, by reason of the key seats 9 and the keys 10, the sections are held against sagglng. This construction makes it possible to do all of the work of assembling from one side of the sections.

Heretofore it has been necessary in setting up structures of this kind em loying a .two-sided form, as for walls and t e like, to wire or otherwise join the two sections. By' reason of the size of the sections and the peculiar arrangement of the locking device some of the sections may be arranged vertically, as clearly shown in Fig. 1. This arrangement of the locking devlces has a twofod advantage one being to employ the sections in different ositions, as just set forth, and the-other a vantage being to fix the locking devices of the sections so that they may not be displaced or lost when not in use. I

The arrangement and construction of the truss for the overhead orceiling sections make it possible to dispense with supports extended from the ceiling to'the floor below, as is ordinary, the advantage of the truss being the free operatings ace inthe 1 room or inclosure formed by t I claim: 1. In a metal form for monolithic concrete structures, a form unit comprising a rectan lar sheet, marginal reinforces for said s set, pivoted lockin devices having spaced-apart jaws secure at intervals to two of said marginal reinforces, and keepers secured to the remaining marginal reinforces and arranged in the same manner at like intervals as the said locking devices, so that complementary-units may be secured together without regard to relative arrangement of the units.

2. In a form for monolithic concrete structures, a plurality of rectangular sec: tions' or units, each section having angular marginal references, two margins of each section having secured thereto locking devices comprising a member pivotally secured to the marginal reinforces and having e sections.

a pair of spaced-apart jaws, devices secured to the said margins for causing said sections or units to register vertically, devices secured to said marginal reinforces adjacent said lockin devices and arranged to receive truss eys, keepers secured to the remaining mar ins of each unit and disposed identically lifie .thesaid locking devices, so that the locking devices and keepers of different sections or units will have cooperament of the different sections.

In testimony whereof, I have signed my tive positions regardless of the arrangename to this specification, in presence of two subscribing witnesses, I

LUDWIG EI SENKRAMER.

Witnesses E. L. WALLACE, N. G. BUTLER. 

